Start9 Server Pure having stability issues

This looks like a known bug (already fixed for v0345), where the websocket connection gets lost for a few seconds every 5-10min. I might need more details to understand your problem. If the service pages are becoming unavailable, but your main UI is up, then this is indicative of Bonjour issues. With what errors does the main UI become unavailable? Is the server accessible on another device when it becomes unavailable on your Windows machine?